Speaker: Maxim Pospelov, University of Victoria and Perimeter Institute

Subject: Neutrino portal

Refreshments to be served outside 101 Fraser after the colloquium.

Neutrino masses and mixing point to the existence of new physics beyond the Standard Model. The simplest realization of neutrino mass generation is related to new fermionic massive states, the right-handed neutrinos, not charged under any of the Standard Model gauge groups. The mass scale of these new states is almost arbitrary, while their couplings are most likely related to their masses via the so-called seesaw relation. In my talk, I will describe how one can search for right handed neutrinos should their masses fall within energy reach of modern colliders and beam dump experiments, such as the LHC and new planned SHiP facility. I will also discuss modifications to the SM with neutrinos carrying new gauge interactions, and show that this increases our chances to discover right handed neutrinos within the range of couplings suggested by the seesaw relation.